1. Gargoyles attack skeletons.
Then, different scenarios:
1. Black Dragons kill elves, take damage from skeletons, then retreat, followed by summoning elementals.
2. Black Dragons attack skeletons, take slightly less damage, then retreat, followed by summoning elementals.
3. Black Dragons kill elves, attack again, then scenario 2.
4. Black Dragons attack skeletons, attack them again, leaving approximately 500 health – no chance of winning.
1. Black Dragons take damage from skeletons and Colossal Dragons (without being able to retaliate against either). A comparable number of dragons remain, and my Colossal Dragons, due to their stats, look significantly better.
2. Elves remain, and in this case, they hide behind the Colossal Dragons and skeletons, making the situation uncertain.
3. Similar to 1, if they attack the skeletons a second time, the skeletons attack them a second time without retaliation, and the battle can be lost altogether.
4. In the end, there are no Black Dragons left, only elementals, resulting in a draw. (By the way, where did you get the number 500 for the skeletons? Were you casting spells on my behalf? Naturally, on my first turn, I cast Steel Skin on the skeletons, leaving about 700 of them to deal with the elementals).
The correct option was essentially suggested by PREDS. However, it needs clarification. On the first turn, you shouldn't attack the skeletons and elves, but the Colossal Dragons (!) without retaliation. Block the elves with red dragons, sacrificing them. On the second turn, eliminate the elves with black dragons, losing half of them in the process. Then, retreat from the skeletons and simply use the ranged attack. My 3 Colossal Dragons won't be able to defeat your 7 Black Dragons. This is the only option that clearly leads to your victory. In the others, as I repeat, there are possible outcomes. We can continue arguing, but what's the point? I myself found a clearly losing option for me and have already agreed to the defeat :)